Adolescents should receive a periodontal examination as part of their routine dental visits, since the plaque-induced gingivitis is a very common type of gingivitis in children and adolescents. The aim of this paper was to report the diagnosis and treatment of plaque-induced gingivitis in adolescents. In addition, this paper discusses the importance of a specific and individual treatment directed to young patient, since the psychological and behaviors changes that occur during this phase are related to the compliance and the good response after the treatment.